Process of manufacturing chlorobenzene.



V. E. AUGER.

PROCESS OF MANUFACTURING CHLOROBENZENE. APPLICATION FILED FEB. 29. ms.

Patented Apr. 25,1916.

hereby declare vreron nrrrtn auenn, or. rams, rnaivcn.

- PROCESS 01 kt NUFACTURING CHLOROBENEENE.

To all whom it may concern:

Be it known that ll, VroToR-Errmn Auden,

citizen of the Republic'of France, resident of Rue Humboldt, Paris, in the said He public, professor, and useful Improvements -in. Processes of Manufacturing @hlorobenzehe; and I do the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being bad to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

It is well known that benzene becomes directly chlorated when it is heated together with perchlorid of iron, or else under the action of chlorin in the presence of aluminium chlorid, or under the action of a current of chlorin on a solution of perchlorid of iron in benzene in the presence of iron (German Patent No. 219,242, to Saccharinfabrik Aktiengesellschaft vorm. Fablber List & Go, dated October 5th 1907).

ltdy invention relates to a new continuous method of manufacturing chlorobenzene which consists in saturating the benzene with chlorin and causin obtained and which is o substantially constant strength to pass into a columncon taining iron shavings. The reaction is immediate the hydrochloric acid is developed and chlorobenzene obtained. I have found that this process gives the best output in practice. Both chlorobenzene and polychlorated' products are obtained. The liquid issuing from the apparatus contains about of chlorobenzene and the ratio of chlorobenzene relatively to the polychlorated products is as follows: chlorobenzene, 100; polychlorated products, 6.

The process is suitably conducted in an apparatus which is diagrammatically shown in vertical section in the drawing.

The working of the process is as follows: Gaseous chlorin, which does not need to be absolutely dry, is admitted at the bottom of a cooled column A, containing 'silicious stones onto which streams of benzene are caused to fall. The internal lining of the column is made of lead; as shown, the col-- Specification of Letters Patent.

have invented certain new the solution thus Patented Apr. 25, 1916.

I Application filed February 29,1916. Serial No. 81,178.

umn is provided with an indicator which permits to adjust the affiux of benzene so as to have it saturated with chlorin. The solution thus obtained automatically passes into a cast iron column B filled with ironshavings and externally cooled. The solution of chlorin in benzene is admitted at the bottom of the column; the reaction is immed1ate: the hydrochloric gas is developed and the liquid resulting from the reaction goes out by an overflow openin provided at the three uarters of the heig t of the column. The mixture of benzene, chlorobenzene, hy-

drochloric acid and iron chlorid passes into a column 0 containing carbonate of lime moistened with water, in which it is deprived of its iron and hydrochloric acid. Chlorobenzene is separated from the. benzene and polychlorated products by means of a fractional distillation in the distilling apparatus 10.

Having now particularly ascertained the nature of my said invention and the best means I know of carrying the same into practice, I claim:

1. A continuous process for manufacturing chloro-benzene, which comprises dissolv-' ing chlorin in benzene and then causing the solution so obtained to act on iron.

2. A continuous process for manufacturing chlorobenzene, which comprises forming a solution of constant strength of benzene containing chlorin dissolved therein and causing the solution to act on iron to form chloro-benzene.

3. A continuous process for manufacturing chloro-benzene, which comprises forming a solution of chlorin in benzene by causing benzene and chlorin to flow in a contacting counter current, and discharging the resulting liquid into a container containing iron.

4. A continuous process for manufacturing chloro-benzene, which comprises dissolving chlorin in benzene, causing the solution so obtained to act on iron, removing the hydrochloric acid and chlorid of iron from the resultin solution and finally fractionating the resu ting liquid to obtain chloro-benzene.

5'. A continuous process for manufacturing chloro-benzene, which comprises forming a solution of chlorin in benzene by causdescribed and i ing benzene and chlorin to flow fn a contactinvention, have signed my name in ing founter current, discharging the resultpresence of two subscribing witnesses. ing i ui into a. container containin iron removing the hydrochloric acid and c lorid VICTPB E K 5 of iron and finally distilling the resulting Witnesses: Y

1i uid to obtajn chloro-benz'ene.

CHAS. P. PRESSLY, n testlmon hat I claim theforegoing as CHARLES EUGENE ARSI. 

